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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Income Taxes (Textual) [Abstract]          
Effective tax rate (percent) 55.00% 45.00% 57.00% 42.00%  
Undistributed earnings on a book basis for the non-U.S. subsidiaries $ 13,400   $ 13,400    
Unrecognized deferred tax liability related to undistributed earnings of non-U.S. subsidiaries 1,100   1,100    
Total unrecognized tax benefits 1,600   1,600    
Accrued interest and penalties 953   953   $ 951
Expected additional federal and state tax expense $ 31,000   $ 31,000